"Built in the 15th century by Red Hugh O’Donnell and overlooking the River Eske in Donegal Town, this fortress was nearly destroyed after O’Donnell lost a battle in the Nine Years' War but was restored in 1616 by Sir Basil Brooke, who added a manor house, tower, and boundary wall. The castle was fully renovated in the early 1990s to retain the styles of the 15th and 17th centuries; visitors can take tours and visit an on-site museum (opening dates vary by season)." - Patricia Doherty Patricia Doherty Patricia Doherty is a writer who specializes in covering destinations, resorts, and cruises for Travel + Leisure and other publications. Travel + Leisure Editorial Guidelines